Improvement in drawing-frames



'nicht /ttia GEORGE DRAPER, 0F HOPEDALE., MASSACHUSETTS.

Letters Patent No.113,752. dated April 18, 1871.

IMPROVEMENT IN DRAWING-FRAMES.

The Schedule referred to in these Letters Patent and making part of the zame- To all persons to whom these presents mag/come.-

Be it known that I, GRORGE DRAPER, of Hopedale, of the county of Worcester and State of Massachusetts,'have made a new and useful invention having reference towhatare termed Drawing-Regulators for Spinning Machinery; and I do hereby de-l clare the same to be fully described in the following specification and represented in the accompanying drawing, of whiclh- Figure 1 is a side elevation of certain well-known parts of a drawing-regulator' with my additions thereto.

Figure 2 is a top View of the same.

Figure 3 is au edge view ofthe hanged disk or rocker-plate and the contiguous parts with which it operates.

Figure 4 is a side elevation of such rocker-plate.

Figure 5 shows the rocker-plate with its saddle as ordinarily constructed.

Figure 6 is a representation of such with the elongation or addition `to the length of the saddle c, as made in carrying out my invention, such addition being on one side only of the medial line of the original rocker-plate, and being represented (as shaded with black lilies) at s".

y The object ot' the invention is the production of a sliver of even thickness, thereby insuring a thread of even'di'ameter when spun from suoli sliver, a'result rarely attainable by ordinary draft-regulators, particularly in that well known as the Wyllys draftregulator, which was patented on January 28, 1851, the patent having been reissued ou July 21, 1864, and subsequently extended for a term of .seven years beyond the original term of fourteen years.

In most if not all well-known drawing-regulators heretofore in use the trumpet has been subjected to the action of a weight, or its equivalent, operating against the pressure or draft of the sliver upon the trumpet, and with the same or nearly the same force whether the trumpet be pressed t0 its extreme of forward motion, or, in consequence of the sliver being of not sucient thickness, being allowed to fall back to its other extreme of motion or to any position between the two.

It must be borne in mind that the distance of vibration of a trumpet of a draft-regulator is conned to about the length of the staple ofthe cotton or fibrous material, because there has to be such a degree of condensation of the sliver in the trumpet as would cause the sliver to pull apart were the mouth of the trumpet at a distance from the vbite of the calendarrollers greater than the length ofthe staple. In most cases the extent of vibration of the trumpet, when in action on a cotton sliver, will not exceed three-fourths v of an inch.

Though in Wyllys regulator .the trumpet turns ou a pivot. and is mounted on a vibratory arm, such an application of the trumpet fails in practice to overcome the dilculty which it is the purpose of my invention to prevent. Although Wyllysv draft-regulator has gone into very extensive use, his Inode of supporting and operating the trumpet has mostly been abandoned and others substituted.

With the vibratory trumpet now in general use the weight operates withl nearly equal force in whatever position the trumpet may be within its limit of motion, the sliver, when of the right size or thickness, causing the trumpet to assume its medial position,

the mechanismfor changing the relative speed ofthe draft-rollers being at rest.

When the sliver in the trumpet is too large or thick it will 'overcome the resistance of the weight and press the trumpet forward, and set at work the evener or mechanism, so as to increase the draft until lthe sliver may be properly reduced.

So, when the sliver in the trumpet may be too small or not of sucient thickness the weight will eiect a retraction of the trumpet and set the mechanism at work to lessen the draft, so as to increase the size or thickness of the sliver.

Such is the theoretical action of the parts; but in practice, when the size of the sliver is increased ow ing to the condensed condition of theV cotton in the trumpet, the latter' will be pressed or drawn forward or toward the calendar-rollers, often with great power,

and there kept 'with the mechanism to change the draft of the sliver operating to its full capacity, until the sliver becomes too small, in which case the elect will be to let the trumpet fall back past the Imedial position, the result being an uneven sliver.

When the sliver is too light the power to change the trumpet is much less in'proportion; consequently, when at its rear extreme position it (the trumpet) will not stay too long, as it will when at its forward extreme; for, as soon as the trumpet may become full it will move forward with the sliver.

Greater trouble comes from making the sliver lighter rather than heavier with respect to the standard size; for, if heavier, there is a waste of stock, which may result in a slight imperfe'ction'not detrimentalito the streng h cf the fabric; but, in case' the sliver is not thick nough, the thread or yarn made from it will be too fine, and, as a consequence, its strength will be proportionally impaired.

Having less ber, the thread or yarn will require more twist to impart to it the necessary strength;

therefore a sliver, when made too small, will produce au imperfection in the woven'lfabric made of it.

In the common draft-regulators, when the trumpet is' at its medial position the flanged rocker-plate will have attained its medial position, so as' to prevent the reciprocating pawls, while in oscillation, from actuating their gear so as to vary the speed of the draft-rollers. From this it will be seen that an equal departure either way of the trumpet from such medial position will cause a like -degree of move-ment of the rockerplate.

In the drawing- A B are the calendar-rollers.

C, the trumpet.

D, the lever,V on whose shorter arm, a, the trumpet is supported.

E is the adjustable weight of the longer arm b of the said lever. I

F is the rocker-plate, provided with the saddle or A ark-flange c, and joined to the trumpet-lever by a counecting-rod, h.

G is the gear. H,1th'e vibratory arm carrying'the two pawls, d e. I is the connecting-rod for imparting to the pawlarm H a reciprocating vihratory motion, suc-h pawls, when out of action upon the gear, resting on the saddle or flange c.

K is au adjustable stop iixed to the upright or part L of the frame of the machine, such stop beingto limit the upward motion of the longer arm of the trumpet-lever and thereby determine the extent of advance of the trumpet The stop is held to the plane or part L by a screw, f, which goes ,through a slot, g, in the stop, and screws into the p art L, the head of the screw serving to clamp the stop in position.

Y -In carrying out my invention I elongate the saddle of the rocker-plate at one end beyond its normal length. By such normal length (I mean that arcal length whicl it should have to cause the pawls while in vibration to effect no mot-ion of the gear when the trumpet is at its medial position.

This elongation, shown at' s, and the arrangement p of it, becomes au'additional mechanism to ei'fect a new result. Whereas in other draft-regulators the arcal length of the saddle of therocker-plate is equal practically to the length of the sweep of the pawls, with my said improvement the areal lengthof the saddle is greater than the sweep of the pawls, the difference in length being the portion s', and being arranged on one side only of that part of the saddle which is directlv underneath the common axis of the pivot of the pawlswhen they are at the position-they assume when the trumpet is at its medial position. f

From this it will be seen that when the trumpet is at its medial position there will be no movement of the gear G; but when the trumpet advances beyond its medial position a small movement of the gear will follow-iu comparison to what may result when the trumpet may fall back from its medial position.

The adjustable stop K is to enable me to arrest the advance of the trumpet relatively to the bite of the calendar-rollers.'

Thus, in carrying out my invention, I have coinbined with the vibratory trumpet the rocker-,plate and its gear, the saddle elongation s', which isa mechan` ism that, when the trumpet is in its most advanced position, will cause a much smaller' arc of gear-teeth to be presented to the action of one pawl. to what will result with respect to the other pawl when the trumpet may fall back'to its rear-most position. Consequently, by means of this addition of the elongation s', or bywhat would be an equivalent therefor, l am enabled to effect desirable new and useful results as respects the draft or the operation of the-drait-rollers.

I claim- 1. In combination with the vibratory trumpet C,

thevibratory pawls d e, and their gearG of a draftregulator, the rockerfplate F as made with the elongation s of its saddle or flange c, arranged to operate substantially as described. l

2. The combination of 'the adjustable ,stop K with the vibratory trumpet, the vibratory pawls and their gear, and the rocker-plate F as made with the elongation s of its saddle, arranged to operate substantially as described.

GEORGE DRAPER.

Witnesses:

H. EDDY, J. It. Snow. 

